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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0141885a3dde56e3b4062f2bb0d39b51e82d235294c0ba508a60b597afe91eb2' 
  AND token = '4R8G8e71rK2MavF0xQ62vmjY4f4uR0vRQg/0O0ZKKEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}